Boost Dropoffs
#15
The stock turbo wont hold boost to redline. Its a very common problem that almost everybody has. They dont even hold boost to redline when theyre stock from the factory. Only way to fix it is to upgrade turbos.
#17
Are you using the stock Mazda black vacuum lines? If you're using silicon lines that is a BIG no-no. Silicon lines will swell with heat and pop off, and could easily be the problem.
Basically, it's either a vacuum line that's leaking or an exhaust leak.
My brother's T-25 in his SR20DET would spike to like 16 and settle down to like 14 until he is is in either 3rd, 4th, or 5th gear, then it's perfect. It hits 14 and stays right there. He tells me it's his manual boost controller that is causing the leak, but he used to think it was just the size of the turbo. I don't know.
I've got a T3/T4 on my S5 motor, and I'm going to have to use a manual boost controller because I'm not sure what the stock boost on that turbo will be, and I don't wanna blow my motor...:/
Basically, it's either a vacuum line that's leaking or an exhaust leak.
My brother's T-25 in his SR20DET would spike to like 16 and settle down to like 14 until he is is in either 3rd, 4th, or 5th gear, then it's perfect. It hits 14 and stays right there. He tells me it's his manual boost controller that is causing the leak, but he used to think it was just the size of the turbo. I don't know.
I've got a T3/T4 on my S5 motor, and I'm going to have to use a manual boost controller because I'm not sure what the stock boost on that turbo will be, and I don't wanna blow my motor...:/
#18
Originally Posted by Lionheart240' date='Apr 7 2004, 07:21 AM
Are you using the stock Mazda black vacuum lines? If you're using silicon lines that is a BIG no-no. Silicon lines will swell with heat and pop off, and could easily be the problem.
Basically, it's either a vacuum line that's leaking or an exhaust leak.
My brother's T-25 in his SR20DET would spike to like 16 and settle down to like 14 until he is is in either 3rd, 4th, or 5th gear, then it's perfect. It hits 14 and stays right there. He tells me it's his manual boost controller that is causing the leak, but he used to think it was just the size of the turbo. I don't know.
I've got a T3/T4 on my S5 motor, and I'm going to have to use a manual boost controller because I'm not sure what the stock boost on that turbo will be, and I don't wanna blow my motor...:/
Basically, it's either a vacuum line that's leaking or an exhaust leak.
My brother's T-25 in his SR20DET would spike to like 16 and settle down to like 14 until he is is in either 3rd, 4th, or 5th gear, then it's perfect. It hits 14 and stays right there. He tells me it's his manual boost controller that is causing the leak, but he used to think it was just the size of the turbo. I don't know.
I've got a T3/T4 on my S5 motor, and I'm going to have to use a manual boost controller because I'm not sure what the stock boost on that turbo will be, and I don't wanna blow my motor...:/
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